This page contains Onslaught Unlockables for Nintendo Wii called "Upgrade locations" and has been posted or updated on Feb 25, 2009 by thouit. Let us know what you think of this Unlockable by thumbs voting.
Each weapon (including grenades and the whip) has 2 upgrades that count as additional weapons. The upgrades carry over even if you start a new game on another difficulty (on the same save spot).
|Unlockable:||How to Unlock:|
|2nd level Assault Rifle||Box in Mission 5|
|2nd level Grenades||Clear Missions 1, 2 and 3 in Normal difficulty (S rank)|
|2nd level Rocket Launcher||Clear Missions 9, 10 and 11 in Normal difficulty (S rank)|
|2nd level SMG||Box in Mission 3|
|2nd level Shotgun||Box in Mission 11|
|2nd level Whip||Clear Missions 5, 6 and 7 in Normal difficulty (S rank)|
|3rd level Assault Rifle||Beat the game in Ultra difficulty|
|3rd level Grenades||Clear Missions from 1 to 8 in Hard difficulty (S rank)|
|3rd level Rocket Launcher||Clear Missions from 1 to 12 in Ultra difficulty (S rank)|
|3rd level SMG||Beat the game in Hard difficulty|
|3rd level Shotgun||Beat the game in Expert difficulty|
|3rd level Whip||Clear Missions from 1 to 8 in Expert difficulty (S rank)|
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